Room-temperature synthesis of triple-cation green perovskite quantum dots for optoelectronic applications.

• Tác giả: Jean-Sébastien Bénas, Takayuki Chiba, Yu-Hang Huang, Yuna Igarashi, Junji Kido, Ryota Kobayashi, Chi-Ching Kuo, Fang-Cheng Liang, Fu-Chieh Liu, Shoki Mizoguchi, Ryosuke Oikawa, Chun-Hsien Ou
• Ngôn ngữ: eng
• Thông tin xuất bản: England : Materials horizons , 2025
• Bộ sưu tập: NCBI
• ID: 159735

Tóm tắt

The development of multi-cation perovskite quantum dots (PQDs) is limited by the low availability of fitting A-site cations due to the unsuitable radii of a large gamut of amine cations. The impact of oversized or undersized cations on the perovskite structure is detrimental to the structural stabilization and electroluminescence efficiency of the PQDs. Researchers are actively seeking suitable-sized cations to mitigate perovskite defect formation and optimize charge carrier confinement within the PQDs. In contrast to cesium (Cs) or formamidine (FA), which are exposed to degradation pathways, guanidinium (GA)-doping has been to provide a suitable radius and the lack a dipole moment. The triple nitrogen functionality of GA enables it to passivate both the PbBr